The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2006
Filed:
Dec. 13, 2004
Sang Hee Kang, Seoul, KR;
Dong Gyu Lee, Seoul, KR;
Seung Ho Hyun, Goyang-si, KR;
Yong Cheol Kang, Jeonju-si, KR;
Sang Hee Kang, Seoul, KR;
Dong Gyu Lee, Seoul, KR;
Seung Ho Hyun, Goyang-si, KR;
Yong Cheol Kang, Jeonju-si, KR;
Myongji University, Seoul, KR;
Abstract
Disclosed herein is a method of compensating for the distorted secondary/ current of a current transformer. The method includes steps (a), (b) and (c). At step (a), the saturated section of the current transformer is detected. At step (b), fault current generated during a fault in a power system is represented using an AutoRegressive (AR) model, with the fault current being assumed to be a combination of a Direct Current (DC) offset component, a fundamental wave component and harmonic components. At step (c), coefficients of the AR model are estimated and the secondary current during saturation of the current transformer is compensated, based on the secondary current data sampled in the unsaturated section.